:root {
  --bg: #eff8f4;
  --surface: #ffffff;
  --ink: #062b2b;
  --deep: #003c3c;
  --teal: #00d6b5;
  --teal-dark: #00a88f;
  --mint: #d9fff3;
  --cream: #fff5cf;
  --text: #173d3b;
  --muted: #5d7572;
  --line: #d8ebe5;
  --shadow: 0 22px 54px rgba(0, 60, 60, 0.14);
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family:
    Inter, "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", "Segoe UI",
    system-ui, -apple-system, sans-serif;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
}

img {
  display: block;
  max-width: 100%;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  max-width: 860px;
  margin: 0 auto;
  color: #ffffff;
  font-size: 64px;
  line-height: 1.04;
  letter-spacing: 0;
  text-align: center;
}

h2 {
  margin: 0;
  color: var(--ink);
  font-size: 42px;
  line-height: 1.14;
  letter-spacing: 0;
}

h3 {
  margin: 0;
  color: var(--ink);
  font-size: 22px;
  line-height: 1.25;
  letter-spacing: 0;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 28px;
  min-height: 74px;
  padding: 14px min(5vw, 72px);
  background: rgba(239, 248, 244, 0.92);
  border-bottom: 1px solid rgba(0, 60, 60, 0.1);
  backdrop-filter: blur(16px);
}

.brand,
.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-size: 19px;
  font-weight: 950;
  line-height: 1;
}

.brand img,
.footer-brand img {
  width: 44px;
  height: 44px;
  border-radius: var(--radius);
  object-fit: cover;
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.site-nav a {
  border-radius: var(--radius);
  color: var(--deep);
  font-size: 14px;
  font-weight: 900;
  line-height: 1;
  padding: 11px 14px;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  background: var(--mint);
  outline: none;
}

.header-actions {
  display: flex;
  justify-content: flex-end;
}

.header-link,
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius);
  font-weight: 950;
  line-height: 1.1;
}

.header-link {
  min-height: 42px;
  background: var(--deep);
  color: #ffffff;
  font-size: 14px;
  padding: 0 18px;
}

.nav-toggle {
  display: none;
}

.hero {
  background: var(--deep);
  padding: 84px min(5vw, 72px) 64px;
}

.hero-inner {
  max-width: 980px;
  margin: 0 auto;
  text-align: center;
}

.deal-badge {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  margin: 0 0 24px;
  border-radius: 999px;
  background: var(--cream);
  color: var(--ink);
  font-size: 14px;
  font-weight: 950;
  padding: 0 16px;
}

.hero-lede {
  max-width: 720px;
  margin: 22px auto 0;
  color: rgba(255, 255, 255, 0.82);
  font-size: 20px;
  line-height: 1.75;
  text-align: center;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 34px;
}

.btn {
  min-height: 54px;
  border: 1px solid transparent;
  font-size: 16px;
  padding: 0 24px;
  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease;
}

.btn:hover,
.btn:focus-visible {
  transform: translateY(-2px);
  outline: none;
}

.btn-primary {
  background: var(--teal);
  color: var(--ink);
  box-shadow: 0 14px 28px rgba(0, 214, 181, 0.24);
}

.btn-secondary {
  border-color: rgba(255, 255, 255, 0.24);
  background: rgba(255, 255, 255, 0.1);
  color: #ffffff;
}

.hero-note {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-top: 26px;
}

.hero-note span {
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.86);
  font-size: 13px;
  font-weight: 900;
  padding: 8px 12px;
}

.trust-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  background: var(--line);
  border-bottom: 1px solid var(--line);
}

.trust-strip div {
  background: #ffffff;
  padding: 24px min(4vw, 42px);
}

.trust-strip strong {
  display: block;
  color: var(--ink);
  font-size: 17px;
  line-height: 1.2;
}

.trust-strip span {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 750;
  line-height: 1.45;
}

.section-band {
  padding: 78px min(5vw, 72px);
}

.section-heading {
  max-width: 740px;
  margin: 0 auto 34px;
  text-align: center;
}

.section-heading.compact {
  max-width: 560px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--teal-dark);
  font-size: 13px;
  font-weight: 950;
  letter-spacing: 0;
}

.section-heading p {
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.75;
}

.pricing {
  background: var(--bg);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  max-width: 1120px;
  margin: 0 auto;
}

.price-card {
  display: grid;
  align-content: start;
  min-height: 430px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #ffffff;
  padding: 28px;
  box-shadow: 0 10px 28px rgba(0, 60, 60, 0.06);
}

.price-card.is-featured {
  border-color: var(--teal);
  box-shadow: var(--shadow);
  transform: translateY(-8px);
}

.price-card p {
  margin: 0 0 12px;
  color: var(--teal-dark);
  font-size: 13px;
  font-weight: 950;
}

.price-card strong {
  display: block;
  margin: 20px 0;
  color: var(--ink);
  font-size: 30px;
  line-height: 1;
}

.price-card ul {
  display: grid;
  gap: 10px;
  margin: 0 0 26px;
  padding: 0;
  list-style: none;
}

.price-card li {
  position: relative;
  color: var(--text);
  font-size: 15px;
  line-height: 1.55;
  padding-left: 22px;
}

.price-card li::before {
  content: "";
  position: absolute;
  top: 9px;
  left: 0;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--teal);
}

.price-card a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  align-self: end;
  min-height: 48px;
  border-radius: var(--radius);
  background: var(--deep);
  color: #ffffff;
  font-size: 15px;
  font-weight: 950;
  padding: 0 18px;
}

.price-card.is-featured a {
  background: var(--teal);
  color: var(--ink);
}

.features {
  background: #ffffff;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  max-width: 1120px;
  margin: 0 auto;
}

.feature-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 28px;
}

.feature-card span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 34px;
  margin-bottom: 24px;
  border-radius: var(--radius);
  background: var(--mint);
  color: var(--deep);
  font-size: 13px;
  font-weight: 950;
}

.feature-card p,
.faq-list p {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.7;
}

.final-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  background: var(--deep);
  padding: 56px min(5vw, 72px);
}

.final-cta h2 {
  max-width: 680px;
  color: #ffffff;
}

.final-cta .eyebrow {
  color: var(--teal);
}

.faq {
  background: var(--bg);
}

.faq-list {
  display: grid;
  gap: 12px;
  max-width: 880px;
  margin: 0 auto;
}

.faq-list details {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #ffffff;
  padding: 0 22px;
}

.faq-list summary {
  cursor: pointer;
  color: var(--ink);
  font-size: 17px;
  font-weight: 950;
  line-height: 1.35;
  padding: 20px 0;
}

.faq-list p {
  margin: -2px 0 20px;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 30px min(5vw, 72px);
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
}

.site-footer p {
  margin: 0;
}

@media (max-width: 920px) {
  .site-header {
    grid-template-columns: auto auto;
    gap: 16px;
    min-height: 66px;
  }

  .nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    justify-self: end;
    width: 42px;
    height: 42px;
    border: 1px solid rgba(0, 60, 60, 0.12);
    border-radius: var(--radius);
    background: #ffffff;
    padding: 0;
  }

  .nav-toggle span,
  .nav-toggle span::before,
  .nav-toggle span::after {
    display: block;
    width: 18px;
    height: 2px;
    border-radius: 2px;
    background: var(--ink);
    transition: transform 0.2s ease;
  }

  .nav-toggle span {
    position: relative;
  }

  .nav-toggle span::before,
  .nav-toggle span::after {
    content: "";
    position: absolute;
    left: 0;
  }

  .nav-toggle span::before {
    top: -6px;
  }

  .nav-toggle span::after {
    top: 6px;
  }

  .nav-open .nav-toggle span {
    background: transparent;
  }

  .nav-open .nav-toggle span::before {
    transform: translateY(6px) rotate(45deg);
  }

  .nav-open .nav-toggle span::after {
    transform: translateY(-6px) rotate(-45deg);
  }

  .site-nav,
  .header-actions {
    grid-column: 1 / -1;
    display: none;
  }

  .nav-open .site-nav,
  .nav-open .header-actions {
    display: grid;
  }

  .site-nav {
    justify-content: stretch;
    gap: 6px;
    padding-top: 8px;
  }

  .site-nav a {
    background: #ffffff;
  }

  .header-link {
    justify-content: center;
  }

  h1 {
    font-size: 46px;
  }

  h2 {
    font-size: 32px;
  }

  .trust-strip,
  .pricing-grid,
  .feature-grid {
    grid-template-columns: 1fr;
  }

  .price-card.is-featured {
    transform: none;
  }

  .final-cta,
  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 560px) {
  .site-header {
    padding: 10px 16px;
  }

  .brand img,
  .footer-brand img {
    width: 38px;
    height: 38px;
  }

  .hero {
    padding: 58px 18px 44px;
  }

  h1 {
    font-size: 36px;
  }

  h2 {
    font-size: 28px;
  }

  .hero-lede {
    font-size: 16px;
  }

  .hero-actions,
  .final-cta .btn {
    display: grid;
    width: 100%;
  }

  .btn {
    width: 100%;
  }

  .hero-note {
    display: grid;
    grid-template-columns: 1fr;
  }

  .trust-strip div,
  .section-band,
  .final-cta {
    padding-left: 18px;
    padding-right: 18px;
  }

  .section-band {
    padding-top: 58px;
    padding-bottom: 58px;
  }

  .price-card,
  .feature-card {
    padding: 22px;
  }

  .price-card {
    min-height: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}